An experimental study is reported on forced-convective condensation heat transfer of R134a inside a horizontal smooth tube, using a 13m long, 11mm inside diameter test tube.The refrigerant temperature varied from 27 to 35℃. The mass flux varied from 250 to 510 kg/(m2.s). The heat flux ranged from 4 to 28 kW/m2. The vapor quality ranged from 1.0 to 0.0. The experimental results were compared with seven existing correlations. The correlation of Boyko has a reasonable agreement, and is suggested for use of R134a.
